Energy
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Units of measurement
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Energy measurement
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Conversion of units of measurement
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Outline of energy
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List of energy topics
Units of energy
Because energy is defined via work, the SI unit for energy is the same as the unit of work – the joule (J), named in honor of James Prescott Joule and his experiments on the mechanical equivalen...
The World’s Most Powerful Laser Has Just Been Fired In Japan
Scientists in Japan have set the record for the most powerful laser ever fired, producing a 2 petawatt pulse - that’s 2 quadrillion watts - using a device known as the Laser for Fast Ignition Experime...
Kilowatt hour
The kilowatt hour (symbol kWh, kW·h, or kW h) is a unit of energy equal to 1,000 watt-hours, or 3.6 megajoules. If the energy is being transmitted or used at a constant rate (power) over a p...
Watt second
A watt second (also watt-second, symbol W s or W·s) is a derived unit of energy equivalent to the joule.(Taylor & Thompson 2008, pp. 39–40, 53) The watt-second is the energy equiva...
Billion cubic metres of natural gas
Billion cubic metres of natural gas (abbreviated: bcm) is a measure of natural gas production and trade. Depending of implied standards, this measure may represent different value of energy content. ...
Teraton
The tonne (/tʌn/) (British and SI; SI symbol: t) or metric ton (American) is a non-SI metric unit of mass equal to 1000 kilograms; it is thus equivalent to one megagram (Mg). 1,000 kilograms is equiva...
Erg
An erg (short for ergon, a Greek word meaning "work/task") is a unit of energy and mechanical work equal to 10 joules. It originated in the centimetre–gram–second (CGS) system of units, symbol "erg". ...
Erg - Wikipedia
Watt-hour per kilogram
The watt-hour per kilogram (SI abbreviation: W⋅h/kg) is a unit of specific energy commonly used to measure the density of energy in batteries and capacitors. One watt-hour per kilogram is equal to 36...
Tonne of oil equivalent
The tonne of oil equivalent (toe) is a unit of energy defined as the amount of energy released by burning one tonne of crude oil. It is approximately 42 gigajoules, although as different crude oils h...
Foot-pound (energy)
The foot-pound force (symbol: ft·lbf or ft·lbf), or simply foot-pound (symbol: ft·lb) is a unit of work or energy in the Engineering and Gravitational Systems in United States customary and imperial u...
Petaton
The tonne (/tʌn/) (British and SI; SI symbol: t) or metric ton (American) is a non-SI metric unit of mass equal to 1000 kilograms; it is thus equivalent to one megagram (Mg). 1,000 kilograms is equiva...
Gasoline gallon equivalent
Gasoline gallon equivalent (GGE) or gasoline-equivalent gallon (GEG) is the amount of alternative fuel it takes to equal the energy content of one liquid gallon of gasoline. GGE allows consumers to co...
Barrel of oil equivalent
The barrel of oil equivalent (BOE) is a unit of energy based on the approximate energy released by burning one barrel (42 U.S. gallons or 158.9873 litres) of crude oil. The BOE is used by oil and gas...
Rydberg constant
The Rydberg constant, symbol R∞ or RH, named after the Swedish physicist Johannes Rydberg, is a physical constant relating to atomic spectra, in the science of spectroscopy. The constant first arose a...
Kilokaiser
The Kaiser (K) is a unit of energy. A common form is kiloKaiser (kK). 1 kK = 1000 cm. ( cm, wavenumber or inverse wavelength.) This unit is most commonly used with respect to energy transitio...
Conversion of units of energy
Conversion of units is the conversion between different units of measurement for the same quantity, typically through multiplicative conversion factors.
The process of conversion depends on the sp...
Foot-poundal
The Foot-poundal (symbol: ft-pdl) is a unit of energy that is part of the foot-pound-second system of units, in Imperial units introduced in 1879, and is from the specialized subsystem of English Abs...
Therm
The therm (symbol thm) is a non-SI unit of heat energy equal to 100,000 British thermal units (BTU). It is approximately the energy equivalent of burning 100 cubic feet (often referred to as 1 CCF) of...
Quad (unit)
A quad is a unit of energy equal to 10 (a short-scale quadrillion) BTU, or 1.055 × 10 joules (1.055 exajoules or EJ) in SI units.The unit is used by the U.S. Department of Energy in discussing wo...
Quad (unit) - Wikipedia
Kilogram oil equivalent
Kilogram(s) of oil equivalent (kgoe) is a normalised unit of energy. By convention it is equivalent to the approximate amount of energy that can be extracted from one kilogram of crude oil. It is a st...
Electronvolt
In physics, the electronvolt (symbol eV; also written electron volt) is a unit of energy equal to approximately 160 zeptojoules (symbol zJ) or 1.6×10 joules (symbol J). By definition, it is the amount...
Electronvolt - Wikipedia
Milliwatt hour
The kilowatt hour (symbol kWh, kW·h, or kW h) is a unit of energy equal to 1,000 watt-hours, or 3.6 megajoules. If the energy is being transmitted or used at a constant rate (power) over a p...
Exaton
The tonne (/tʌn/) (British and SI; SI symbol: t) or metric ton (American) is a non-SI metric unit of mass equal to 1000 kilograms; it is thus equivalent to one megagram (Mg). 1,000 kilograms is equiva...
TNT equivalent
TNT equivalent is a method of quantifying the energy released in explosions. The "ton of TNT" is a unit of energy equal to 4.184 gigajoules (1 gigacalorie), which is approximately the amount of energ...
TNT equivalent - Wikipedia
Cubic mile of oil
The cubic mile of oil (CMO) is a unit of energy. It was created by Hew Crane of SRI International to aid in public understanding of global-scale energy consumption and resources.Significant sources o...
Cubic mile of oil - Wikipedia
Hartree
The hartree (symbol: Eh or Ha), also known as the Hartree energy, is the atomic unit of energy, named after the British physicist Douglas Hartree. It is defined as 2R∞hc, where R∞ is the Rydberg const...
Newton metre
The newton metre is a unit of torque (also called "moment") in the SI system. The symbolic form is N m or N·m. One newton metre, sometimes hyphenated newton-metre, is equal to the torque resultin...
Newton metre - Wikipedia
Planck energy
In physics, Planck energy, denoted by EP, is the unit of energy in the system of natural units known as Planck units.where c is the speed of light in a vacuum, ћ is the reduced Planck's constant, and ...
Orders of magnitude (energy)
This list compares various energies in joules (J), organized by order of magnitude.
This SI unit is named after James Prescott Joule. As with every International System of Units (SI) unit whose na...
Calorie
The name calorie is used for two units of energy.Although these units are part of the metric system, they have been superseded in the International System of Units by the joule. One small calorie is ...
Joule
The joule (/ˈdʒuːl/ or sometimes /ˈdʒaʊl/), symbol J, is a derived unit of energy, work, or amount of heat in the International System of Units. It is equal to the energy transferred (or work done) wh...